A new look at rank tests in ordered-2×k contingency tables |
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| Authors: | Thomas Permutt Vance W Berger |
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| Institution: | U.S. Food and Drug Administration , Rockville, Maryland, 20857, U.S.A |
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| Abstract: | We consider testing for association in contingency tables with 2 rows and k columns, where the columns represent ordered categories. If the rows are treatments and the columns are outcomes, this may be treated as a two-sample problem with all the outcomes tied at one of only k values. Then rank tests may be applied even without knowing the values. Some special considerations apply, however, and the most usual rank tests may not be the best ones. We use a graphical technique to compare the properties of various rank tests. |
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| Keywords: | van der Waerden test maximum chi-square operating characteristic P-P plot stochastic order |
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